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STUDY ON THE RELATIONSHIP BETWEEN THE VEGETATION CHANGE AND THE HUMAN ACTIVITIES IN THE GANSU-QINGHAI REGION DURING THE PERIOD FROM MID-TO LATE-HOLOCENE
AN Cheng-bang, CHEN Fa-hu
Arid Land Geography . 2002, (2): 160 -164 .  DOI: 10.13826/j.cnki.cn65-1103/x.2002.02.013